Creating primary defects in calcium fluoride crystals with various prehistories, using pulsed electron irradiation

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Abstract

Optical spectroscopy with nanosecond resolution has been used to study how the prehistory (the presence of impurities, heat treatment) of CaF 2 crystals affects the processes of creating autolocalized excitons (AEs) under the influence of a pulse of accelerated electrons. The breakdown of the dispersivity condition for the creation of AEs is detected in a nominally pure, nonheat-treated crystal. It is shown that the initial structural defects play a defining role in creating the initial defect density. A model of the radiation disordering of an actual fluorite crystal is constructed. An analogy is traced to the processes of impurity and thermal disordering.

Original languageEnglish
Pages (from-to)396-403
Number of pages8
JournalPhysics of the Solid State
Volume41
Issue number3
Publication statusPublished - Mar 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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